1972 frame

[Speeding Big Twin]

Speeding Big Twin,
I agree, my 1971 frame numbers are like you showed in your photo. I wonder if Tgarcia's frame wasn't a factory replacement frame due to damage occured from an accident in its years of service???

I agree a replacement frame is a possibility. I have photos of some other 1970s VINs on frames with the longer boss. Some look like fake stampings but others may be authentic and some of those are even on 83–84/85 style frames.

Notice in my example the C and H are what I call narrow and the H appears to have its crossbar higher than halfway while on the other frame the C and H appear wider and the H looks to have its crossbar in the centre. But in this instance I don’t think those differences necessarily indicate something untoward. If it’s a replacement frame it may even be on record at the factory.
Eric

[tgarcia]

It's up in the garage rafters so it's a huge pain to get down to take pictures of in its entirety.i can probably get pictures of the forgings and motor mount when I get home.

[dukekleman]

Speeding Big Twin,
I agree, my 1971 frame numbers are like you showed in your photo. I wonder if Tgarcia's frame wasn't a factory replacement frame due to damage occured from an accident in its years of service???

[Speeding Big Twin]

Thanks for the photo but the VIN boss is longer than I’d expect. Here’s what it normally looked like for 72.







As of 1981 models the amount of characters in the frame VIN increased from nine to seventeen although the VIN boss didn’t increase in length until about mid-81. Your VIN boss looks like the longer style.

Can you post photos of both sides of the entire frame please.
And look for a date code on the left side of the top engine mount. Photo?
Also look for numbers on both lower rear forgings. Photos? Thanks.
Eric

[tgarcia]

PXL_20230529_194107057~2.jpg
here it is,I don't really have any love for this frame just trying to figure it out since it's sitting around the garage. Probably pass it on to someone who could use a good frame.

[Speeding Big Twin]

I agree someone may have changed the round swingarm to the disc brake style swingarm. But just because the VIN ends with H2 doesn’t necessarily mean it’s a 72 frame. What do the VIN characters look like? Are they consistent with factory stamping for a 72 frame? For example are the C and H a certain width? Any 4s, 6s/9s? If so what types? If you’re not sure what a 72 FX frame VIN normally looks like you could post a partial photo. For example 2C123++H2.

Also check the frame date code and the numbers on both lower rear forgings. Photos?
Eric

[tgarcia]

Yes it's H2, it's a shame that it got replaced because the frame is mint.

[joe fxs fxr]

Most likely someone changed the swing arm to the later style. Does VIN end in H2? If so it's a 72 model year frame.

[tgarcia]

I have a 1972 fx frame that has a disc brake swing arm. Did they have disc brakes in 72 or could this be a late model frame technically 73 model year or maybe swapped out. Don't know much about fx models.